Getting Less Mileage Than Promised? Here's Why

our car's mileage is nowhere close to the number you saw on the specifications sheet.

If this has happened to you, you're certainly not alone. The mileage advertised by car manufacturers and the mileage you experience in everyday driving can be quite different.

But does that mean the company is misleading you?

Not necessarily.

The difference often comes down to how the mileage is tested versus how you actually drive. Traffic, road conditions, driving habits, air conditioning, tyre pressure and even the weight inside your car can affect fuel efficiency.

Here's why your car may be giving you less mileage than the company claims.

Before blaming your car, it is important to understand what the advertised mileage figure represents.

Car manufacturers test vehicles under standardised conditions designed to provide a consistent basis for comparison between models. These tests are not the same as driving through crowded city roads during rush hour.

In India, mileage figures are generally associated with standard testing procedures under controlled conditions.

Your daily drive, however, is unpredictable.

You may spend 20 minutes crawling through traffic, accelerate frequently, stop at signals, run the air conditioner continuously and encounter potholes or uneven roads.

All of these factors can affect fuel consumption.

So, when your car gives 14 km/l in everyday city driving despite having a higher official mileage figure, it doesn't automatically mean something is wrong with the vehicle.

One of the biggest reasons for poor real-world mileage is stop-and-go traffic.

Every time your car accelerates from a complete stop, the engine needs to work harder. When you repeatedly accelerate, brake and stop, fuel consumption can increase.

This is particularly noticeable during peak traffic hours.

A car travelling at a steady speed on an open road can generally be more fuel-efficient than the same car repeatedly moving between first gear, second gear and a complete stop.

This is why the same vehicle can return very different mileage figures depending on where you drive it.

Frequent stops + acceleration + idling = lower mileage.

Steady speeds + fewer stops = potentially better mileage.

Two people can drive the same car on the same road and get different mileage.

Why?

Their driving habits may be completely different.

Aggressive acceleration, sudden braking and unnecessarily high engine speeds can increase fuel consumption. Constantly pushing the accelerator and then braking shortly afterwards is particularly inefficient.

If you want better mileage, try to accelerate smoothly and maintain a consistent speed whenever traffic conditions allow.

You don't have to drive extremely slowly. The goal is simply to avoid unnecessary bursts of acceleration and braking.

Living in a hot climate means the air conditioner can be essential rather than optional.

But using the AC can affect your car's fuel efficiency because the system requires energy to operate.

How much it affects mileage depends on several factors, including the vehicle, outside temperature, cooling requirements and driving conditions.

Running the AC while the car is stationary for long periods can also consume fuel.

That doesn't mean you should avoid using your AC. Instead, use it sensibly.

Once the cabin has cooled down, maintaining a comfortable temperature is generally more sensible than constantly setting the system to maximum cooling.

Your tyres have a direct relationship with how efficiently your car moves.

When tyres are underinflated, they create greater rolling resistance. That means the engine may have to work harder to keep the vehicle moving.

This can contribute to lower fuel efficiency.

Fortunately, checking tyre pressure is one of the easiest things you can do.

Check your tyre pressure regularly and follow the manufacturer's recommended pressure rather than simply using the number you remember from your last visit to a petrol pump.

Don't assume that higher pressure automatically means better mileage either. Incorrectly inflated tyres can affect handling, braking and tyre wear.

That gym bag you've been carrying in the boot for three months?

Those boxes you keep telling yourself you'll remove?

They may not seem important individually, but unnecessary weight can affect fuel consumption.

The heavier the vehicle, the more energy it requires to accelerate.

You don't need to empty your car every morning. But if your boot has gradually become a storage area, it might be time for a clean-up.

Remove items you don't actually need and you may make your car a little more efficient.

A car that isn't maintained properly may not perform as efficiently as it should.

Dirty filters, worn components, old engine oil, problems with the fuel system or other mechanical issues can potentially affect fuel consumption.

This is why regular servicing matters.

If your car's mileage has suddenly dropped instead of gradually changing, don't simply assume that fuel prices or traffic are responsible.

A sudden and unexplained change could be a reason to have the vehicle inspected.

Do you regularly drive just two or three kilometres to the nearby market?

Short journeys can sometimes result in lower fuel efficiency because the vehicle doesn't spend much time operating under steady conditions.

Repeated short trips also mean more frequent starting, stopping and acceleration.

If several small errands are close together, combining them into one trip can sometimes be more efficient than taking the car out repeatedly.

Of course, this depends on your route and circumstances.

Road conditions also influence mileage.

Potholes, speed breakers, steep roads, rough surfaces and frequent intersections can force you to slow down and accelerate repeatedly.

Driving uphill requires more effort from the engine as well.

This means someone living in a relatively flat area with smooth roads may see different real-world mileage from someone driving regularly through hilly terrain or congested streets.

The car hasn't necessarily changed. The environment has.

The quality of fuel and the condition of the vehicle's fuel system can influence engine performance.

While you cannot control every factor related to fuel, consistently choosing reliable fuel stations is a sensible practice.

If your car suddenly begins performing differently after refuelling, pay attention to whether the issue repeats.

For persistent performance or mileage problems, it is better to have the vehicle checked rather than assuming every problem is caused by the fuel itself.

Modern cars often display average fuel economy on the dashboard.

It's useful, but it shouldn't always be treated as a laboratory-accurate measurement of your actual fuel consumption.

The most reliable way to understand your real-world mileage is to track fuel usage over several refuelling cycles.

You can use the simple full-tank method:

1. Fill the tank completely.
2. Reset your trip meter.
3. Drive normally.
4. Fill the tank again.
5. Note how much fuel you added.
6. Divide the distance travelled by the litres of fuel used.

For example, if you travel 420 km and use 35 litres of fuel:

420 ÷ 35 = 12 km/l

Repeating this over multiple refuelling cycles gives you a better idea of your car's actual average mileage.

There isn't one universal answer.

A car's real-world mileage depends on its engine, transmission, fuel type, vehicle weight, road conditions, traffic, driving style, maintenance and climate.

A vehicle advertised with a high official mileage figure may naturally deliver considerably less in heavy city traffic.

Instead of comparing your everyday mileage directly with the number printed in a brochure, think of the official figure as a standardised benchmark.

Your actual mileage is your car's performance under your specific driving conditions.

You don't need to completely change the way you drive.

A few simple habits can help:

• Keep your tyres at the recommended pressure.
• Avoid unnecessary hard acceleration.
• Maintain a steady speed when road conditions allow.
• Don't leave the engine idling unnecessarily.
• Remove unnecessary weight from the car.
• Follow the manufacturer's service schedule.
• Use the AC sensibly.
• Avoid aggressive driving and sudden braking.
• Combine short errands when practical.
• Track your mileage over several fuel refills.

The biggest improvement often comes from combining several small changes rather than relying on one magic trick.

The mileage printed in a car brochure and the mileage you see on your daily commute are not necessarily supposed to be identical.

Official figures come from standardised testing, while your real-world mileage is influenced by everything from traffic and tyre pressure to driving style and air conditioning.

So, the next time your car gives you less mileage than advertised, don't immediately assume you've bought the wrong car.

Instead, look at the bigger picture.

Your car's mileage isn't just about the car. It's also about how, where and under what conditions you drive it.

And sometimes, a few small changes in your driving habits can help you get considerably closer to the fuel efficiency your car is capable of delivering.

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